EP2065128B1 - Electrical tool - Google Patents

Electrical tool Download PDF

Info

Publication number
EP2065128B1
EP2065128B1 EP08020549A EP08020549A EP2065128B1 EP 2065128 B1 EP2065128 B1 EP 2065128B1 EP 08020549 A EP08020549 A EP 08020549A EP 08020549 A EP08020549 A EP 08020549A EP 2065128 B1 EP2065128 B1 EP 2065128B1
Authority
EP
European Patent Office
Prior art keywords
suction
opening
passage
airflow
blowing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08020549A
Other languages
German (de)
French (fr)
Other versions
EP2065128A1 (en
Inventor
Hans Hermle
Manfred Richter
Karl Schellhammer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mafell AG
Original Assignee
Mafell AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mafell AG filed Critical Mafell AG
Publication of EP2065128A1 publication Critical patent/EP2065128A1/en
Application granted granted Critical
Publication of EP2065128B1 publication Critical patent/EP2065128B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0042—Devices for removing chips
    • B23Q11/006—Devices for removing chips by sucking and blowing simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/008—Cooling means

Definitions

  • the present invention relates to an electrical processing machine or a power tool, in particular electric jigsaw or router, with a system for removing chips by means of an air flow, which comprises a blow duct with a blowing opening and a suction channel arranged in the region of a tool, in particular a saw blade or a milling tool comprising a suction opening arranged opposite the blow opening.
  • the resulting during machining of a workpiece chips are blown away by the exiting the blow opening air flow from the saw blade or milling tool and into the suction channel.
  • the suction duct typically terminates at the rear end of the power tool in a suction nozzle to which an external suction device, for example a vacuum cleaner, can be connected. In this way, a reliable removal of the chips is guaranteed.
  • the patent US 4,974,907 A discloses a pneumatic concrete separating cutter in which the compressed air provided by a conduit is divided at a branch into a first air flow and a second air flow. While the first air flow is blown against the cutting disc for cooling, the second air flow is directed into a suction tube by means of a venturi effect to generate a negative pressure.
  • the object of the invention is to provide an electrical processing machine in which a clogging of the suction channel and an undesirable heat transfer can be avoided in a simple manner.
  • the power tool has a system for removing chips by means of an air flow, which is designed so that a part of the available air flow enters the blow channel to blow the chips substantially in the direction of the suction opening, and another part of the available air flow between the suction port and an outlet end enters the suction channel to cause by means of the Venturi effect, a removal of the chips from the suction channel.
  • the need for an external suction device can be circumvented by dividing the available air flow, using a part for generating a negative pressure in the suction channel by means of the Venturi effect.
  • the vacuum generated in this way is sufficient to cause an active removal of the chips from the suction channel, whereby a blockage of the suction channel is avoided.
  • the processing machine according to the invention can therefore be used without problems connected vacuum cleaner become.
  • Another advantage of the principle of the invention is that a portion of the optionally warm air flow is removed from the machine in a relatively short path and thus reduces the heat transfer from the air flow to the Maschinenenkomponenten.
  • a system for removing sawdust is integrated by means of an air flow generated by the motor fan.
  • a blow port 11 and a suction channel 15 is formed in the base plate 21, wherein in the top of the base plate 21 each have an opening 23, 25 for supplying the air flow to the blow port 11 and the suction channel 15 is provided.
  • the saw blade is arranged perpendicular to the upper side of the base plate in a recess of the base plate front side and is located substantially between the blow opening 13 and the suction opening 17.
  • the saw blade is arranged perpendicular to the upper side of the base plate in a recess of the base plate front side and is located substantially between the blow opening 13 and the suction opening 17.
  • the openings 23, 25 for supplying the air flow are arranged side by side and are located at a point of the base plate 21, which is incident on the attached machine part emerging from the engine fan air flow. Therefore, part of the airflow exiting the machine part enters the opening 23 and is directed through the blow port 11 in the direction of the blow port 13, while another part of the provided air flow enters the port 25 and through the rear portion of the suction port 15 in the direction Outlet end 19 is passed.
  • the high-velocity air flowing into the suction channel 15 generates a negative pressure in the region of the opening 25 due to the Venturi effect. This negative pressure causes sawdust, which are located between the suction opening 17 and the opening 25 in the suction channel 15, to be sucked in and in the direction Exit end 19 are transported.
  • the opening 25 can additionally be provided with a device for increasing the flow velocity, for example a Venturi nozzle.
  • a deflection unit 27 is releasably attached, which is able to direct the exiting the suction channel 15 air flow in the direction of the top of the workpiece to be machined and thus bring about an orderly placement of the removed sawdust on the workpiece.
  • the deflection unit 27 may be provided, for example, in the form of a diverter or profile attachment with suitable Heilleitdonn.
  • the machine part When using the jigsaw without a vacuum cleaner, the machine part is placed on the base plate 21 and a saw cut on a workpiece is performed.
  • the air flow generated by the engine fan is used both as a blowing stream for blowing the sawdust accumulating in the suction opening 17 and for the active removal of the sawdust from the suction channel 15.
  • the saw can thus be used as long as desired without connected vacuum cleaner, without risking a blockage of the suction channel 15.
  • the deflection unit 27 also causes the discharged sawdust are not randomly distributed in the vicinity of the outlet end and thus cause a high dust load, but are accumulated in the form of a straight line on the workpiece. This orderly accumulation of sawdust facilitates the subsequent cleaning of the workpiece considerably.
  • the deflection unit 27 is removed from the outlet end 19 and the hose of the provided vacuum cleaner is plugged onto the outlet end 19.
  • the sawing with suction is then carried out in the usual way, with the additional removal of the chips from the suction channel 15, the suction through the vacuum cleaner not further affected.
  • the jigsaw according to the invention can thus be used both with and without external suction, without the risk of clogging of the suction channel 15 is made. Further, a part of the motor heat supplied from the fan is discharged in a relatively short path without being passed through the entire passage 11 and the portion of the suction passage 15 between the suction port 17 and the opening 25 and thereby undesirably discharge a considerable amount of heat to the base plate 21.

Description

Die vorliegende Erfindung betrifft eine elektrische Bearbeitungsmaschine oder ein Elektrowerkzeug, insbesondere elektrische Stichsäge oder Oberfräse, mit einem System zum Abtransportieren von Spänen mittels eines Luftstroms, welches einen Blaskanal mit einer im Bereich eines Werkzeugs, insbesondere eines Sägeblatts oder eines Fräswerkzeugs, angeordneten Blasöffnung und einen Saugkanal mit einer gegenüber der Blasöffnung angeordneten Saugöffnung umfasst.The present invention relates to an electrical processing machine or a power tool, in particular electric jigsaw or router, with a system for removing chips by means of an air flow, which comprises a blow duct with a blowing opening and a suction channel arranged in the region of a tool, in particular a saw blade or a milling tool comprising a suction opening arranged opposite the blow opening.

Bei derartigen Elektrowerkzeugen, z.B. Stichsägen oder Oberfräsen, werden die während der Bearbeitung eines Werkstücks anfallenden Späne durch den aus der Blasöffnung austretenden Luftstrom von dem Sägeblatt bzw. Fräswerkzeug weg und in den Saugkanal hineingeblasen. Der Saugkanal endet typischerweise am hinteren Ende des Elektrowerkzeugs in einem Absaugstutzen, an den eine externe Saugvorrichtung, beispielsweise ein Staubsauger, angeschlossen werden kann. Auf diese Weise wird ein zuverlässiges Abtransportieren der Späne gewährleistet.In such power tools, e.g. Jigsaws or routers, the resulting during machining of a workpiece chips are blown away by the exiting the blow opening air flow from the saw blade or milling tool and into the suction channel. The suction duct typically terminates at the rear end of the power tool in a suction nozzle to which an external suction device, for example a vacuum cleaner, can be connected. In this way, a reliable removal of the chips is guaranteed.

Allerdings ist es in der Praxis häufig erwünscht, das Elektrowerkzeug auch ohne einen angeschlossenen Staubsauger einzusetzen. Da in diesem Fall kein aktives Entfernen der Späne aus dem Saugkanal erfolgt, sammelt sich mit der Zeit eine zunehmende Menge an Spänen in dem Saugkanal an, was zu dessen Verstopfung führen kann. Ein weiteres Problem kann darin bestehen, dass ein unerwünschter Wärmeübertrag von dem Luftstrom an das Elektrowerkzeug erfolgt.However, it is often desirable in practice to use the power tool without a connected vacuum cleaner. Since no active removal of the chips from the suction channel takes place in this case, an increasing amount of chips accumulates in the suction channel over time, which can lead to its blockage. Another problem may be that there is an undesirable transfer of heat from the air flow to the power tool.

Die Patentschrift US 4,974,907 A offenbart ein pneumatisches Beton-Trennschneidgerät, bei welchem die mittels einer Leitung bereitgestellte Druckluft an einer Abzweigung in einen ersten Luftstrom und einen zweiten Luftstrom aufgeteilt wird. Während der erste Luftstrom zur Kühlung gegen die Trennscheibe geblasen wird, wird der zweite Luftstrom zur Erzeugung eines Unterdrucks mittels Venturi-Effekt in ein Saugrohr geleitet.The patent US 4,974,907 A discloses a pneumatic concrete separating cutter in which the compressed air provided by a conduit is divided at a branch into a first air flow and a second air flow. While the first air flow is blown against the cutting disc for cooling, the second air flow is directed into a suction tube by means of a venturi effect to generate a negative pressure.

Aufgabe der Erfindung ist es, eine elektrische Bearbeitungsmaschine zur Verfügung zu stellen, bei welcher auf einfache Weise ein Verstopfen des Saugkanals und ein unerwünschter Wärmeübertrag vermieden werden.The object of the invention is to provide an electrical processing machine in which a clogging of the suction channel and an undesirable heat transfer can be avoided in a simple manner.

Die Lösung dieser Aufgabe erfolgt durch die Merkmale des Anspruchs 1.The solution of this object is achieved by the features of claim 1.

Erfindungsgemäß weist das Elektrowerkzeug ein System zum Abtransportieren von Spänen mittels eines Luftstroms auf, welches derart gestaltet ist, dass ein Teil des zur Verfügung stehenden Luftstroms in den Blaskanal eintritt, um die Späne im Wesentlichen in Richtung der Saugöffnung zu blasen, und ein anderer Teil des zur Verfügung stehenden Luftstroms zwischen der Saugöffnung und einem Austrittsende in den Saugkanal eintritt, um mittels des Venturi-Effekts eine Abfuhr der Späne aus dem Saugkanal zu bewirkten.According to the invention, the power tool has a system for removing chips by means of an air flow, which is designed so that a part of the available air flow enters the blow channel to blow the chips substantially in the direction of the suction opening, and another part of the available air flow between the suction port and an outlet end enters the suction channel to cause by means of the Venturi effect, a removal of the chips from the suction channel.

Erfindungsgemäß wurde erkannt, dass die Notwendigkeit einer externen Saugvorrichtung dadurch umgangen werden kann, dass der zur Verfügung stehende Luftstrom geteilt wird, wobei ein Teil zur Erzeugung eines Unterdrucks in dem Saugkanals mittels des Venturi-Effekts genutzt wird. Der so erzeugte Unterdruck reicht aus, um eine aktive Abfuhr der Späne aus dem Saugkanal zu bewirken, wodurch eine Verstopfung des Saugkanals vermieden wird. Die erfindungsgemäße Bearbeitungsmaschine kann daher auch ohne angeschlossenen Staubsauger problemlos eingesetzt werden. Ein weiterer Vorteil des Prinzips der Erfindung besteht darin, dass ein Teil des gegebenenfalls warmen Luftstroms auf relativ kurzem Weg aus der Maschine abgeführt wird und so der Wärmeübertrag von dem Luftstrom an die Maschinenkömponenten verringert wird.According to the invention, it has been recognized that the need for an external suction device can be circumvented by dividing the available air flow, using a part for generating a negative pressure in the suction channel by means of the Venturi effect. The vacuum generated in this way is sufficient to cause an active removal of the chips from the suction channel, whereby a blockage of the suction channel is avoided. The processing machine according to the invention can therefore be used without problems connected vacuum cleaner become. Another advantage of the principle of the invention is that a portion of the optionally warm air flow is removed from the machine in a relatively short path and thus reduces the heat transfer from the air flow to the Maschinenenkomponenten.

Bevorzugte Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen, der Beschreibung sowie der Zeichnung beschrieben.Preferred embodiments of the invention are described in the dependent claims, the description and the drawings.

Die Erfindung wird im Folgenden beispielhaft unter Bezugnahme auf die Zeichnung beschrieben, welche schematisch eine Ansicht auf die Oberseite einer Grundplatte einer erfindungsgemäßen Stichsäge zeigt.The invention is described below by way of example with reference to the drawing, which schematically shows a view on the top of a base plate of a jigsaw according to the invention.

Auf der in Fig. 1 dargestellten Grundplatte 21 ist der nicht gezeigte Maschinenteil einer hier als Beispiel für ein erfindungsgemäßes Elektrowerkzeug beschriebenen elektrischen Stichsäge angeordnet. Der Maschinenteil kann einen Elektromotor mit Kühlgebläse, einen Kraftübertragungsmechanismus und ein Sägeblatt umfassen. Er kann ferner lösbar mit der Grundplatte 21 verbindbar, z.B. auf diese aufsteckbar sein. In die Grundplatte 21 ist ein System zum Abtransportieren von Sägespänen mittels eines von dem Motorgebläse erzeugten Luftstroms integriert. Hierzu ist in der Grundplatte 21 ein Blaskanal 11 und ein Saugkanal 15 ausgebildet, wobei in der Oberseite der Grundplatte 21 jeweils eine Öffnung 23, 25 zum Zuführen des Luftstroms an den Blaskanal 11 und den Saugkanal 15 vorgesehen ist. Bei aufgestecktem Maschinenteil wird während des Betriebs eine von dem Motorgebläse erzeugte Luftströmung (in Fig. 1 durch Pfeile schematisch dargestellt) über die Öffnung 23 zur Blasöffnung 13 geleitet. Die Saugöffnung 17 wiederum steht über den Saugkanal 15 mit einem Austrittsende 19 in Verbindung, welches beispielsweise als Saugstutzen ausgebildet sein kann, an den auf herkömmliche Weise der Schlauch eines Staubsaugers anschließbar ist.On the in Fig. 1 illustrated base plate 21 is not shown machine part of an electric jigsaw described here as an example of an inventive power tool arranged. The machine part may comprise an electric motor with cooling fan, a power transmission mechanism and a saw blade. It can also be releasably connected to the base plate 21, for example, be plugged onto this. In the base plate 21, a system for removing sawdust is integrated by means of an air flow generated by the motor fan. For this purpose, a blow port 11 and a suction channel 15 is formed in the base plate 21, wherein in the top of the base plate 21 each have an opening 23, 25 for supplying the air flow to the blow port 11 and the suction channel 15 is provided. When the machine part is plugged in, an airflow generated by the engine fan (in Fig. 1 represented schematically by arrows) via the opening 23 to the blow opening 13. The suction opening 17 in turn is connected via the suction channel 15 with an outlet end 19 in connection, which may be formed for example as suction, to which in a conventional manner the hose of a vacuum cleaner can be connected.

Das nicht gezeigte Sägeblatt ist senkrecht zur Oberseite der Grundplatte in einer Ausnehmung der Grundplattenvorderseite angeordnet und befindet sich im Wesentlichen zwischen der Blasöffnung 13 und der Saugöffnung 17. Somit ergibt sich eine Luftströmung zwischen der Blasöffnung 13 und der Saugöffnung 17, die quer zu der Arbeitsrichtung der Stichsäge verläuft und die anfallende Sägespäne in den Saugkanal 15 hinein befördert.The saw blade, not shown, is arranged perpendicular to the upper side of the base plate in a recess of the base plate front side and is located substantially between the blow opening 13 and the suction opening 17. Thus, there is an air flow between the blow opening 13 and the suction opening 17, transverse to the working direction of jigsaw runs and the resulting sawdust conveyed into the suction channel 15 into it.

Die Öffnungen 23, 25 zum Zuführen des Luftstroms sind nebeneinander angeordnet und befinden sich an einer Stelle der Grundplatte 21, auf welche bei aufgestecktem Maschinenteil die aus dem Motorgebläse austretende Luftströmung auftrifft. Daher tritt ein Teil der aus dem Maschinenteil austretenden Luftströmung in die Öffnung 23 ein und wird durch den Blaskanal 11 in Richtung der Blasöffnung 13 geleitet, während ein anderer Teil der bereitgestellten Luftströmung in die Öffnung 25 eintritt und durch den hinteren Bereich des Saugkanals 15 in Richtung Austrittsende 19 geleitet wird. Die mit hoher Geschwindigkeit in den Saugkanal 15 einströmende Luft erzeugt aufgrund des Venturi-Effekts einen Unterdruck im Bereich der Öffnung 25. Dieser Unterdruck bewirkt, dass Sägespäne, welche sich zwischen der Saugöffnung 17 und der Öffnung 25 im Saugkanal 15 befinden, angesaugt und in Richtung Austrittsende 19 befördert werden. Um einen besonders effizienten Unterdruck zu erzeugen, kann die Öffnung 25 zusätzlich mit einer Vorrichtung zur Erhöhung der Strömungsgeschwindigkeit, beispielsweise einer Venturi-Düse, versehen sein.The openings 23, 25 for supplying the air flow are arranged side by side and are located at a point of the base plate 21, which is incident on the attached machine part emerging from the engine fan air flow. Therefore, part of the airflow exiting the machine part enters the opening 23 and is directed through the blow port 11 in the direction of the blow port 13, while another part of the provided air flow enters the port 25 and through the rear portion of the suction port 15 in the direction Outlet end 19 is passed. The high-velocity air flowing into the suction channel 15 generates a negative pressure in the region of the opening 25 due to the Venturi effect. This negative pressure causes sawdust, which are located between the suction opening 17 and the opening 25 in the suction channel 15, to be sucked in and in the direction Exit end 19 are transported. In order to produce a particularly efficient negative pressure, the opening 25 can additionally be provided with a device for increasing the flow velocity, for example a Venturi nozzle.

Am Austrittsende 19 des Saugkanals 15 ist eine Umlenkeinheit 27 lösbar angebracht, welche in der Lage ist, den aus dem Saugkanal 15 austretenden Luftstrom in Richtung der Oberseite des zu bearbeitenden Werkstücks zu leiten und so ein geordnetes Platzieren der abgeführten Sägespäne auf dem Werkstück herbeizuführen. Die Umlenkeinheit 27 kann beispielsweise in Form eines Ableit- oder Profilaufsatzes mit geeigneten Luftleitwänden vorgesehen sein.At the outlet end 19 of the suction channel 15, a deflection unit 27 is releasably attached, which is able to direct the exiting the suction channel 15 air flow in the direction of the top of the workpiece to be machined and thus bring about an orderly placement of the removed sawdust on the workpiece. The deflection unit 27 may be provided, for example, in the form of a diverter or profile attachment with suitable Luftleitwänden.

Bei einer Verwendung der Stichsäge ohne angeschlossenen Staubsauger wird das Maschinenteil auf die Grundplatte 21 gesteckt und ein Sägeschnitt an einem Werkstück wird durchgeführt. Die durch das Motorgebläse erzeugte Luftströmung wird sowohl als Blasstrom zum Blasen der anfallenden Sägespäne in die Saugöffnung 17 als auch zur aktiven Abfuhr der Sägespäne aus dem Saugkanal 15 genutzt. Die Säge kann somit beliebig lange ohne angeschlossenen Staubsauger verwendet werden, ohne eine Verstopfung des Saugkanals 15 zu riskieren. Die Umlenkeinheit 27 bewirkt darüber hinaus, dass die abgeführten Sägespäne nicht ungeordnet in der Umgebung des Austrittsendes verteilt werden und somit eine hohe Staubbelastung verursachen, sondern in Form einer geraden Linie auf dem Werkstück angehäuft werden. Diese geordnete Anhäufung der Sägespäne erleichtert die spätere Reinigung des Werkstücks erheblich.When using the jigsaw without a vacuum cleaner, the machine part is placed on the base plate 21 and a saw cut on a workpiece is performed. The air flow generated by the engine fan is used both as a blowing stream for blowing the sawdust accumulating in the suction opening 17 and for the active removal of the sawdust from the suction channel 15. The saw can thus be used as long as desired without connected vacuum cleaner, without risking a blockage of the suction channel 15. The deflection unit 27 also causes the discharged sawdust are not randomly distributed in the vicinity of the outlet end and thus cause a high dust load, but are accumulated in the form of a straight line on the workpiece. This orderly accumulation of sawdust facilitates the subsequent cleaning of the workpiece considerably.

Wenn mit externer Absaugung gearbeitet werden soll, so wird die Umlenkeinheit 27 von dem Austrittsende 19 abgenommen und der Schlauch des bereitgestellten Staubsaugers wird auf das Austrittsende 19 aufgesteckt. Das Sägen mit Absaugung erfolgt dann in gewohnter Weise, wobei die zusätzliche Abfuhr der Späne aus dem Saugkanal 15 die Absaugung durch den Staubsauger nicht weiter beeinträchtigt.If you want to work with external suction, the deflection unit 27 is removed from the outlet end 19 and the hose of the provided vacuum cleaner is plugged onto the outlet end 19. The sawing with suction is then carried out in the usual way, with the additional removal of the chips from the suction channel 15, the suction through the vacuum cleaner not further affected.

Die erfindungsgemäße Stichsäge kann also sowohl mit als auch ohne externe Absaugung verwendet werden, ohne dass die Gefahr einer Verstopfung des Saugkanals 15 besteht. Ferner wird ein Teil der vom Gebläse gelieferten Motorwärme auf relativ kurzem Weg abgeführt, ohne durch den gesamten Kanal 11 und den Abschnitt des Saugkanals 15 zwischen Saugöffnung 17 und Öffnung 25 hindurchgeleitet zu werden und dabei in unerwünschter Weise eine beträchtliche Wärmemenge an die Grundplatte 21 abzugeben.The jigsaw according to the invention can thus be used both with and without external suction, without the risk of clogging of the suction channel 15 is made. Further, a part of the motor heat supplied from the fan is discharged in a relatively short path without being passed through the entire passage 11 and the portion of the suction passage 15 between the suction port 17 and the opening 25 and thereby undesirably discharge a considerable amount of heat to the base plate 21.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1111
Blaskanalblow
1313
Blasöffnungblowing opening
1515
Saugkanalsuction
1717
Saugöffnungsuction opening
1919
Austrittsendeexit end
2121
Grundplatte, GrundkörperBase plate, basic body
2323
Öffnungopening
2525
Öffnungopening
2727
UmlenkeinheitReturn unit

Claims (4)

  1. An electrical tool, in particular electrical jigsaw or router having a system for transporting cuttings away by means of an airflow which includes a blowing passage (11) having a blowing opening (13) arranged in the region of a tool, in particular of a saw blade or a milling tool, and a suction passage (15) having a suction opening (17) arranged opposite to the blowing opening (13) and which is designed such that a part of the airflow available enters into the blowing passage (11) in order to blow the cuttings essentially in the direction of the suction opening (17) and another part of the airflow that is available enters into the suction passage (15) between the suction opening (17) and an outlet end (19) in order to bring about the removal of the cuttings from the suction passage by means of the Venturi effect.
  2. An electrical tool in accordance with claim 1,
    characterised in that
    the airflow is generated by a motorized fan.
  3. An electrical tool in accordance with claim 1 or claim 2,
    characterised in that
    the blowing passage (11) and the suction passage (15) are formed in a base plate or in a base body (21) of the electrical tool, with in each case an opening (23, 25) being provided in the topside of the base plate (21) for the supply of the airflow to the blowing passage (11) and to the suction passage (15).
  4. An electrical tool in accordance with any one of the preceding claims,
    characterised in that
    a deflection unit (27) is provided at the outlet end (19) of the suction passage (15) which is able to direct the airflow emerging from the suction passage (15) in the direction of the upper side of the workpiece being machined and thus to bring about an orderly placement of the removed cuttings on the workpiece.
EP08020549A 2007-11-29 2008-11-26 Electrical tool Active EP2065128B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007057531A DE102007057531A1 (en) 2007-11-29 2007-11-29 power tool

Publications (2)

Publication Number Publication Date
EP2065128A1 EP2065128A1 (en) 2009-06-03
EP2065128B1 true EP2065128B1 (en) 2011-04-13

Family

ID=40383703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08020549A Active EP2065128B1 (en) 2007-11-29 2008-11-26 Electrical tool

Country Status (2)

Country Link
EP (1) EP2065128B1 (en)
DE (2) DE102007057531A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009029111B4 (en) 2009-09-02 2021-07-29 Robert Bosch Gmbh Hand machine tool
DE102009051461B4 (en) * 2009-10-30 2012-09-13 Audi Ag Device for trimming molded parts, in particular sheet metal parts
DE102020212660A1 (en) 2020-10-07 2022-04-07 Gühring KG ATTACHMENT
DE102021215131A1 (en) 2021-12-30 2023-07-06 Robert Bosch Gesellschaft mit beschränkter Haftung Jigsaw with tong guide unit accommodated between suction channels
CN116275307B (en) * 2023-03-16 2024-02-02 永业科技（唐山）有限公司 Quasi-dry cutting gear shaving machine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2417228A1 (en) * 1974-04-09 1975-11-06 Heller Geb PROCEDURE FOR SUCTIONING SMALL DRILLS FROM THE DRILLING SITE OF A DRILL AND DRILL, DRILL AND ADAPTER FOR CARRYING OUT THE PROCEDURE
DE3420442A1 (en) * 1984-06-01 1985-12-05 Festo KG, 7300 Esslingen JIGSAW
CH669126A5 (en) * 1987-01-05 1989-02-28 Aciera S A METHOD FOR DISPOSAL OF PULVERULENT MACHINING WASTE.
JPH0236097A (en) 1988-07-26 1990-02-06 Koumu:Kk Air cutter for concrete and the like
DE4310280C2 (en) * 1993-03-30 2001-06-28 Festo Ag & Co Machine tool, in particular hand machine tool, with a chip ejection part
JP3483602B2 (en) * 1993-12-01 2004-01-06 富士重工業株式会社 Cooling dust collector for machine tools
DE10161616A1 (en) * 2001-12-14 2003-06-26 Bosch Gmbh Robert Hand-held machine tool esp. eccentric grinder has cooling air outlet channel opening to outside via chip suction air channel and dust box
US6729811B2 (en) * 2002-04-01 2004-05-04 K-Line Industries, Inc. Cutter tool for bore liners
JP4656806B2 (en) * 2002-11-01 2011-03-23 株式会社マキタ Electric tool
SE528761C2 (en) * 2004-03-05 2007-02-13 Hertig Knut Ab Device for removing loose bored material
DE202006009078U1 (en) * 2006-06-09 2007-10-25 Wolfcraft Gmbh Drilling or milling edge with chip removal device

Also Published As

Publication number Publication date
DE102007057531A1 (en) 2009-06-04
DE502008003159D1 (en) 2011-05-26
EP2065128A1 (en) 2009-06-03

Similar Documents

Publication Publication Date Title
EP2065128B1 (en) Electrical tool
DE102006040784B4 (en) Laser beam processing machine
DE10053582A1 (en) Hand tool with a dust extraction device
EP2922674B1 (en) Tool device with a spray arrangement for binding dust
DE102013020820B4 (en) Suction device and machine tool
EP0674961A1 (en) Drilling equipment consisting of a drilling machine and a drilling chuck
DE102012221275A1 (en) Tool device with a spray device for dust binding
EP2616577B1 (en) Fibre cutting device
DE2856058A1 (en) DIRT REMOVAL DEVICE FOR AN OPEN-END SPINNING UNIT
EP3476534B1 (en) Machining device for machining workpieces and method for removing chips from the mould
EP3330028B1 (en) Machine tool with dust collecting device
EP0774289A1 (en) Filter installation and use thereof
EP1212177A1 (en) Treatment unit with a rotating tool and a suction hood
DE3525092A1 (en) Especially portable severing device, such as a hand-held circular saw, abrasive cutting device or the like
DE102015010520A1 (en) Textile machine and method for using exhaust air at workstations of textile machines
EP1600255B1 (en) Chip sucking device for power tool
EP3235593A1 (en) Moulding device for forming of metal or non-metallic materials
EP2540425B1 (en) Machining tool for machining materials
EP0062781B1 (en) Open-end spinning machine
DE4433306C2 (en) Method and arrangement for the metered supply of lubricant when machining workpieces
DE102022121237A1 (en) Drilling device with a suction unit
WO2024068296A1 (en) Circular saw
DE10338602B3 (en) Motor-driven sawing tool e.g. fretsaw, with fan-assisted air cooling of electric drive motor and discharge of air onto and in front of sawing zone for protecting user from sawdust
EP3944940A1 (en) Saw
EP1190812A1 (en) Device and method for chip removing machining of workpieces

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

17P Request for examination filed

Effective date: 20091202

17Q First examination report despatched

Effective date: 20100105

AKX Designation fees paid

Designated state(s): CH DE GB LI

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE GB LI

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: CH

Ref legal event code: NV

Representative=s name: DR. GRAF & PARTNER AG INTELLECTUAL PROPERTY

REF Corresponds to:

Ref document number: 502008003159

Country of ref document: DE

Date of ref document: 20110526

Kind code of ref document: P

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502008003159

Country of ref document: DE

Effective date: 20110526

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20120116

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502008003159

Country of ref document: DE

Effective date: 20120116

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20121120

Year of fee payment: 5

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20131126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131126

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20230127

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20231202

Year of fee payment: 16